In a mechanical universe where the planet relies on huge clockwork and gears, colors are monopolized by coding, and tears of sadness are condensed into diamonds, becoming the cornerstone of a distorted economy. Zephiel, the shepherd in the clouds, caught a glimpse of a color that did not exist on the spectrum - "twilight purple" during a rare gear lunar eclipse. He is determined to apply for a public patent for this fleeting beauty, making it a free wealth that everyone can enjoy. However, at this time, the core clockwork of the world is quietly aging, and gravity begins to collapse. The ruling class blames all "instability factors" for the crisis, and Zephiel's pursuit is seen as an entropic poison that must be eradicated. When he found that his shadow began to act independently and glowed with the same purple halo, he realized that this color battle was actually the ultimate confrontation with the dying mechanical rules of the entire world - the color he wanted to liberate was the last and only sigh of the silent soul of this universe.
